NP完全性不仅仅是一个理论上的好奇心；它对实际计算有着深远的影响。

When you are young, you think that the world is a place where you can live as you choose. But as you get older, you realize that the world is a place where you have to live as you must.

你必须完整才能快乐。

工作场所的多样性推动创造力和增长。

一滴墨水，可以唤起千百万人的思想。

For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.